Vulcanizer&#39;s die for preserving antiskid tire-treads



0, L MCCORMICK.

VULCANIZERS DIE FOR PRESERVING A NTISKID TIRE TREADS.

APPLlCATlON FILED MAR.20, 1919 1,338,233. 3 I Patenfed Apr. 27, 1920.

STATE tmniini-iihisis .1 u. .1 A. Alix.

' FTLEZGALEZEBJIS DIE FOB PRESERVI' L. MGCOBMICK, 01 BIfiiMIElN/EHAQIRLG ANTIPEHILU Application mm March 20, 1919. Serial No. 263,596.

may concem: that ii, Usoeii L. MoGoii'm'oi; 1 the United States ofAmerict at iiii'minghmn in the county of i State of Alabama, have in micertain new and useful Improve.- Vnicanizers Dies for Preserving LireTremis, of which the follow- 1 specification i t y i". yention reistes'toa Vuicaniicers die .Tfl'fi. for preserving the anttskid tread ,e ofautomobile and truck tires during airs on the same in'voivingvulcanization. tofol'e Wilfil'ifi it has been necessary to s-portion ofthe trezui of an anti-' milking repairs thereon, the aco theviii-ionizing apparatus on the deface of the anttshid tread has yen o1smooth out the iat'tei', sub- .i? totally (iesti'oying its snti-sicidiciesign and leaving that portion in This resu'it has been of pe- Vvantage in the case of blow out plijffii on practically new tiresresulting unusuei punctures or from some in- Wrst defect in the tire.Herotofore soiid nerve been usefi. originally to manufgto design fortire treads and onico'ns-iioieiieCi pizicticui or feasime such dies forrepair jobs not o of the cost of the same but also 1e iiiiiiciiity infitting the soiicl an: t' ski (i tread design.

of my invention is devise a owe he 01. shape? which el having a i) thedemos A tread to he repaired (he or former-coin be 'iopet-f "positionint 1e "5' 1 tread and hold in. i. the is set down into v mold. and theredamped in less 6 es he stamped or known manner tiom h to con-fthemselves tire and to the .ie the viiicenirier to preserve design antisvoiai defsiw defaced that was in the VUiCiHllf J inexpensive easilyments only of my invention re tei'ence is made to the accoinosnyingz" izuvings which form a part of this specific which iiigure 1 is vertical.sectional View through a viiicenizing repair outfit showing an enti-skidtire with my iJI'CiMi preserving die in place during the tnicniiizationof the tire.

Fig. is it plan view ofii section of etyph cal anti-s id tire treadhaving my tread preserving die former applied thereto preparatory toinserting the tire in. the mold Similar yeifei'ence numemis for tosimilar parts throu. out the dmwings.

I have illustrated my invention in con-- nection with a typicalvulcm'iizing *repztii apparatus comprising 2t mold 1 having a clamp 2and it pi'ees sciew 3 engaging a, presser head 4: which is adapted to hein serted into the tire 5 and to press the tread of the latter againstthe mold Winch is heated internaliy in any suitsbie mannelx The tive 5is typicai. of any iinti-skio. tire having its tread sui'feoe 6 formedwith dim mend shaped pi'ojectii'ms 7 separated-by intors acting groovesor channeis 8. This de- Sign is typical of the Goodyear sire but it isumiei'stood.,thrit my invention is adopted for use with any typeof'z'inti-skiii tire. My tread preserving; die '9 as ciesigned for usewith The anti-skid tire illustrated is ferment of meta? punchei,pressed, siiiztpeci or formed by any. suitable mechanical process so asto form a skeieton 51- open Work design corsesponding in shape to thegrooves or (iepree sions in the itiitirSi -iititili'fi tree/(ii The diebeing open can he rem iiiy sippiicc i to the portion of the tire to bevulcanized and fitted. into the grooves or depiressions be t veen theraised portions. of the tree-ti e While hei i in this position the tireWith the die in piace inserted into the viiioenizing inoiiii. antiseciii'eiy clamp-ed in position there in and white thus hehi thevulcanization Wherever i ation, and in designed that this is possibleonly to a partial extent and in this case the die is preferably formedof light flexible sheet metal stamped to provide raised projectionsoonforming to the depressions in the tread and having suflicientopenings by which it can be readily brought into proper position on thetire preparatory to vulcanization.

I do not desire to be limited to any par ticular material or method ofmanufacture for the production of these tread preserving dies but prefera flexible metal die and would regard it advantageous that the lattercan be flattened or nested for compact shi pinent.

This invention. is not intended to be restricted in scope to thespecific embodiment shown, but contemplates such modifications as comewithin the spirit and scope of the claims.

Having thus described my invention,

what I claim as new and desire to secure by Letters Patent, is i 1'. Arepair die for vulcanizing anti-skid tire treads consisting of a shortflexible Inetallie die having raised portions comple mentary to thedepressed portions of the anti-skid tread and provided with sightopenings to adapt it to be fitted into, said depressed portions and tooverlie the portion of the tire to be vulcanized prior to itsintroduction into the vulcanizing apparatus.

2. In a tire repair device of the characteu described, an open work diecomprising raised portions complementary to the depressions in theanti-skid tire tread portion to be vulcanized.

In testimony whereof I aflix my signature OSCAR L. MCCORMICK.-

\Vitness NOMIE lVELsH.

